1: Poles suffer internally - they're hard (5)
3: Concealed hot part of psyche (3)
7: Man, what an avant-garde US artist! (3)
8: Town's rail transport, not express? (9)
9: Backblock not all there (3)
10: I have a head nurse turning up birthmarks (5)
12: Emergency room stocks one sensitive organ (3)
13: Belated top-and-tailing to gladden one's heart (5)